The median of the data 10, 15, x, 25, 30 is 20. Find x.
20
The data 10, 15, x, 25, 30 has 5 values, and it is already arranged with x in the middle position, between 15 and 25.
For 5 values arranged in order, the median is the 3rd (middle) value, which here is x.
Since the median is given as 20, x must be 20, and this value fits consistently between 15 and 25 in ascending order (10, 15, 20, 25, 30).
The mean of 10 observations is 25. If one observation is removed, mean becomes 24. Find removed value.
A bowler has taken wickets : 0, 3, 2, 1, 5, 3, 4, 5, 5, 2, 2, 0, 0, 1, 2. Find mode.
If the mean of the data is 11, find Z : 3, 21, 10, 7, 6, 9, (Z + 6), 15, 20
If X̅ = 20 is the mean of 10 observations x1, x2, ... x10; then what is the value of \(\displaystyle \sum_{i=1}^{10}\left(\frac{3 x_i-4}{5}\right) ?\) ?
What is the mean of the numbers 1, 2, 3, ... 10 with frequencies 9C0, 9C1, 9C2 ..., 9C9, respectively?
Which one of the following measures of central tendency is used in construction of index numbers?
The mean of five numbers is 30. If one number is excluded, their mean becomes 28. The excluded number is
The ‘less than’ ogive curve and the ‘more than’ ogive curve intersect at